Security readout for executives and security teams
Plain-English summary
A flaw in the Tenda HG10 can let a logged-in remote attacker run operating-system commands through a device management function. Successful exploitation could expose data, alter device settings, or disrupt service. Public exploit material exists, but the supplied sources do not establish active exploitation or identify a vendor patch.
Executive priority
Treat confirmed HG10 version 300001138 deployments as an urgent remediation item, prioritizing Internet-accessible or broadly reachable management interfaces. Apply containment promptly and obtain vendor guidance. Public exploit availability increases near-term risk, although active exploitation is not established by the supplied evidence.
Technical view
CVE-2026-86167 affects Tenda HG10 version 300001138. The Boa endpoint /boaform/admin/formgponConf insufficiently neutralizes the fmgpon_loid argument, enabling OS command injection in formgponConf. CVSS 3.1 is 9.9 with network reachability, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impacts.
Likely exposure
Exposure is limited to Tenda HG10 devices running version 300001138, particularly where the management interface is reachable from untrusted networks or accessible to low-privileged accounts. The supplied CPE is broader than the explicitly named affected version, so inventory decisions should use the stated version evidence.
Exploitation context
Remote exploitation is reported as possible, and public exploit material is referenced. The CVSS vector indicates that low privileges are required. This CVE is not identified as KEV in the supplied bundle, and no cited evidence confirms exploitation in operational environments.
Researcher notes
The issue maps to CWE-77 and CWE-78 and concerns command construction from the fmgpon_loid parameter. Evidence identifies a specific function, endpoint, and firmware version, but the bundle provides no patch version, vendor advisory, authentication-path detail, or confirmed incident telemetry. Validate defensively and avoid production exploitation.
Mitigation direction
- Identify Tenda HG10 devices and confirm whether firmware version 300001138 is installed.
- Restrict the management interface to trusted administrative networks and authorized accounts.
- Disable Internet-facing remote management where operationally feasible.
- Review account privileges and remove unnecessary or stale management access.
- Check Tenda guidance for an official fix or supported replacement; none is named here.
Validation and detection
- Verify device model and firmware version through trusted inventory or management records.
- Confirm the management interface is not reachable from untrusted networks.
- Review access controls for low-privileged accounts that can reach the affected function.
- Inspect relevant logs for unusual requests to /boaform/admin/formgponConf.
- After mitigation, revalidate network restrictions and authorized administrative access without attempting exploitation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-86167 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
4 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R3.16VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R3.16VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P——VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR810VulDBVulnerability scoring details
Base CVSS 4.0 score
9.4CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
Base CVSS 3.1 score
9.9CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 3.0 score
9.9CriticalVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 2.0 score
9CriticalVector: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineVulDB
Advisory disclosed
- Source timelineVulDB
VulDB entry created
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineVulDB
VulDB entry last update
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- VDB-399306 | Tenda HG10 Boa formgponConf os command injectionCVE reference, VulDB · vdb-entry, technical-description
- VDB-399306 | CTI Indicators (IOB, IOC, TTP, IOA)CVE reference, VulDB · signature, permissions-required
- CVE-2026-86167 | CVE Analysis and ReportCVE reference, VulDB · third-party-advisory
- Submit #895596 | Tenda HG10 HG7_HG9_HG10re_300001138 Denial of ServiceCVE reference, VulDB · third-party-advisory
- https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/HG10/command-formgponConf-fmgpon_loid.mdCVE reference, VulDB · exploit
- https://www.tenda.com.cn/CVE reference, VulDB · product
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.